Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire

Details Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire Fano factor reduction on the 0.7 structure in a ballistic one-dimensional wire

2004-02-06

arxiv.org/abs/cond-mat/0402194v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.93.116602

We have measured the non-equilibrium current noise in a ballisticone-dimensional wire which exhibits an additional conductanceplateau at $0.7\times2e^2/h$. The Fano factor shows a clearreduction on the 0.7 structure, and eventually vanishes uponapplying a strong parallel magnetic field. These results provideexperimental evidence that the 0.7 structure is associated withtwo conduction channels which have different transmissionprobabilities.

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